Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses

47265 Products showing for Fuses & Circuit Breakers

120 of 999+
In Stock
Littelfuse 125mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-2919
  • Mfr. Part No. 0218.125MXP
Each (In a Pack of 10)
HK$7.81
Temporarily out of stock
Fuse Holder Fuse Block
  • RS Stock No. 263-161
  • Mfr. Part No. EBF2330V1
Each
HK$1,946.90
In Stock
Littelfuse PC Board Non Resettable Fuse, Axial 4A, 125V ac
  • RS Stock No. 895-1612P
  • Mfr. Part No. 0473004.MRT1L
Each (Supplied in a Bag)
HK$11.48
In Stock
Littelfuse Non-Resettable Surface Mount Fuse 60A, 250V ac
  • RS Stock No. 229-1426P
  • Mfr. Part No. 0456060.DRSDE
Each (Supplied on a Reel)
HK$51.70
Temporarily out of stock
Schurter PC Board Non Resettable Fuse, Radial 125mA, 250V ac
  • RS Stock No. 173-9781
  • Mfr. Part No. 0034.6606
Each (In a Bag of 100)
HK$2.569
In Stock
Littelfuse Non-Resettable Wire Ended Fuse 5A, 125V ac
  • RS Stock No. 738-2999P
  • Mfr. Part No. 0471005.NRT1L
Each (Supplied in a Bag)
HK$8.83
In Stock
Littelfuse SMD Non Resettable Fuse 500mA, 63V dc
  • RS Stock No. 820-7108
  • Mfr. Part No. 0438.500WR
Each (In a Pack of 100)
HK$6.908
Temporarily out of stock
Phoenix Contact 25A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 270-2609
  • Mfr. Part No. 3061364
Each (In a Pack of 10)
HK$96.78
In Stock
Schurter 20A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 173-7972
  • Mfr. Part No. 0090.0020
Each (In a Box of 10)
HK$104.00
In Stock
Bourns Surface Mount Fuse 8A, 50 V dc, 63 V dc
  • RS Stock No. 245-9214P
  • Mfr. Part No. SF-0603SPA800R-2
Each (Supplied on a Reel)
HK$5.00
In Stock
Schurter SMD Non Resettable Fuse 5A, 125V ac/dc
  • RS Stock No. 209-9402
  • Mfr. Part No. 3-122-712
Each
HK$26.90
In Stock
Mersen 25A Rail Mount Fuse Holder for 8 x 31mm Fuse, 1P, 400V ac
  • RS Stock No. 287-5806
  • Mfr. Part No. C200769
Each
HK$72.50
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 50mA, 125V ac
  • RS Stock No. 738-3309
  • Mfr. Part No. 39600500000
Each (In a Pack of 10)
HK$14.60
Temporarily out of stock
RS PRO 50A Ceramic Cartridge Fuse, 15 x 22mm
  • RS Stock No. 188-4608
Each
HK$160.65
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-4344
  • Mfr. Part No. 1SDA072512R1
Each
HK$158,968.53
In Stock
Bourns 1.85A Resettable Fuse, 24V
  • RS Stock No. 245-9144
  • Mfr. Part No. MF-LSMF185/24X-2
Each (On a Tape of 10)
HK$4.83
Last RS stock
Bourns 0.3A Resettable Fuse, 72V
  • RS Stock No. 691-7557
  • Mfr. Part No. MF-RX030/72-0
Each (In a Pack of 5)
HK$3.18
In Stock
Bourns 2.6A Resettable Fuse, 6V
  • RS Stock No. 245-9156
  • Mfr. Part No. MF-LSMF260/6X-2
Each (On a Tape of 10)
HK$3.00
In Stock
Eaton 1A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9427
  • Mfr. Part No. S505-1-R
1 Bag of 1000
HK$3,648.00
In Stock
Bourns 2.5A Resettable Fuse, 15V
  • RS Stock No. 647-8099
  • Mfr. Part No. MF-SM250-2
Each (In a Pack of 10)
HK$2.60
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